Surgical stapler



FIG. 1 is a perspective view of a surgical stapler showing my new design;

FIG. 2 is a right side view thereof, the left side view being a mirror image thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a surgical stapler, as shown and described. 